EN 62271-3:2006

SLOVENSKI STANDARD
01-december-2007
Visokonapetostne stikalne in krmilne naprave – 3. del: Digitalni vmesniki, ki
temeljijo na IEC 61850 (IEC 62271-3:2006)
High-voltage switchgear and controlgear -- Part 3: Digital interfaces based on IEC 61850
(IEC 62271-3:2006)
Hochspannungs-Schaltgeräte und -Schaltanlagen - Teil 3: Digitale Schnittstellen nach
IEC 61850 (IEC 62271-3:2006)
Appareillage a haute tension -- Partie 3: Interfaces numériques basées sur la CEI 61850
(IEC 62271-3:2006)
Ta slovenski standard je istoveten z: EN 62271-3:2006
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62271-3
NORME EUROPÉENNE
November 2006
EUROPÄISCHE NORM
ICS 29.130.10
English version
High-voltage switchgear and controlgear
Part 3: Digital interfaces based on IEC 61850
(IEC 62271-3:2006)
Appareillage à haute tension  Hochspannungs-Schaltgeräte
Partie 3: Interfaces numériques und -Schaltanlagen
basées sur la CEI 61850 Teil 3: Digitale Schnittstellen
(CEI 62271-3:2006) nach IEC 61850
(IEC 62271-3:2006)
This European Standard was approved by CENELEC on 2006-09-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62271-3:2006 E
Foreword
The text of document 17C/369/FDIS, future edition 1 of IEC 62271-3, prepared by SC 17C, High-voltage
switchgear and controlgear assemblies, of IEC TC 17, Switchgear and controlgear, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 62271-3 on 2006-09-01.
This standard has the status of a product family standard and may be used as a normative reference in a
dedicated product standard for highvoltage switchgear and controlgear.
This standard is to be read in conjunction with the following documents:
– EN 61850 series "Communication networks and systems in substations"
– EN 62271 series "High-voltage switchgear and controlgear".
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2007-06-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2009-09-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62271-3:2006 was approved by CENELEC as a European
Standard without any modification.
Editorial modifications to IEC 62271-3:2006:
Clause 2, Normative references
Delete the reference to IEC 62271-103.
Add:
IEC 62271-102, High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors
and earthing switches
Clause C.2
In the note below Table C.2, replace "IEC 62271-103" by "IEC 62271-102".
__________
- 3 - EN 62271-3:2006
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC 60050-191 1990 International Electrotechnical Vocabulary - -
(IEV)
Chapter 191: Dependability and quality of
service
1) 2)
IEC 60265-2 - High-voltage switches EN 60265-2 1993
Part 2: High-voltage switches for rated
voltages of 52 kV and above
1) 2)
IEC 60694 - Common specifications for high-voltage EN 60694 1996
switchgear and controlgear standards + corr. May 1999

IEC 60794 Series Optical fibre cables - -

IEC 60870-4 1990 Telecontrol equipment and systems HD 546.4 S1 1992
Part 4: Performance requirements

IEC 60874-10-3 1997 Connectors for optical fibres and cables - -
Part 10-3: Detail specification for fibre optic
adaptor type BFOC/2,5 for single and
multimode fibre
IEC/TR 61850-1 2003 Communication networks and systems in - -
substations
Part 1: Introduction and overview

IEC/TS 61850-2 2003 Communication networks and systems in - -
substations
Part 2: Glossary
IEC 61850-3 2002 Communication networks and systems in EN 61850-3 2002
substations
Part 3: General requirements
IEC 61850-4 2002 Communication networks and systems in EN 61850-4 2002
substations
Part 4: System and project management

IEC 61850-5 2003 Communication networks and systems in EN 61850-5 2003
substations
Part 5: Communication requirements for
functions and device models
1)
Undated reference.
2)
Valid edition at date of issue.

Publication Year Title EN/HD Year
IEC 61850-6 2004 Communication networks and systems in EN 61850-6 2004
substations
Part 6: Configuration description language for
communication in electrical substations
related to IEDs
IEC 61850-7-1 2003 Communication networks and systems in EN 61850-7-1 2003
substations
Part 7-1: Basic communication structure for
substation and feeder equipment - Principles
and models
IEC 61850-7-2 2003 Communication networks and systems in EN 61850-7-2 2003
substations
Part 7-2: Basic communication structure for
substation and feeder equipment - Abstract
communication service interface (ACSI)

IEC 61850-7-3 2003 Communication networks and systems in EN 61850-7-3 2003
substations
Part 7-3: Basic communication structure for
substation and feeder equipment - Common
data classes
IEC 61850-7-4 2003 Communication networks and systems in EN 61850-7-4 2003
substations
Part 7-4: Basic communication structure for
substation and feeder equipment -
Compatible logical node classes and data
classes
IEC 61850-8-1 2004 Communication networks and systems in EN 61850-8-1 2004
substations
Part 8-1: Specific Communication Service
Mapping (SCSM) - Mappings to MMS
(ISO 9506-1 and ISO 9506-2) and to
ISO/IEC 8802-3
IEC 61850-9-1 2003 Communication networks and systems in EN 61850-9-1 2003
substations
Part 9-1: Specific Communication Service
Mapping (SCSM) - Sampled values over
serial unidirectional multidrop point to point
link
IEC 61850-9-2 2004 Communication networks and systems in EN 61850-9-2 2004
substations
Part 9-2: Specific Communication Service
Mapping (SCSM) - Sampled values over
ISO/IEC 8802-3
IEC 61850-10 2005 Communication networks and systems in EN 61850-10 2005
substations
Part 10: Conformance testing
1) 2)
IEC 62271-102 - High-voltage switchgear and controlgear EN 62271-102 2002
Part 102: Alternating current disconnectors + corr. March 2005
and earthing switches
ISO/IEC 7498 Series Information technology - Open systems EN ISO/IEC 7498 Series
interconnection - Basic reference model

- 5 - EN 62271-3:2006
Publication Year Title EN/HD Year
ISO/IEC 8802-3 2001 Information technology - Telecommunications - -
and information exchange between systems -
Local and metropolitan area networks -
Specific requirements
Part 3: Carrier sense multiple access with
collision detection (CSMA/CD) access
method and physical layer specifications

ITU-T V.24 2000 List of definitions for interchange circuits - -
between data terminal equipment (DTE) and
data circuit-terminating equipment (DCE)

NORME CEI
INTERNATIONALE
IEC
62271-3
INTERNATIONAL
Première édition
STANDARD
First edition
2006-06
Appareillage à haute tension –
Partie 3:
Interfaces numériques basées sur la CEI 61850

High-voltage switchgear and controlgear –
Part 3:
Digital interfaces based on IEC 61850

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62271-3  IEC:2006 – 3 –
CONTENTS
FOREWORD.7
INTRODUCTION.11

1 Scope.13
2 Normative references .15
3 Terms and definitions .17
4 Normal and special service conditions .23
5 Ratings and classifications .25
5.1 LNs on the process level of a high-voltage substation .25
5.2 Additional data and LNs for switchgear monitoring .27
5.3 Communication services.29
5.4 Timing requirements.37
5.5 Rated classes for data resolution and precision.45
5.6 Data security .45
5.7 Data integrity.45
5.8 Performance requirements .45
6 Design and construction .47
6.1 General .47
6.2 Technological boundaries.57
6.3 Mechanical requirements.63
6.4 Electrical requirements.63
6.5 EMC.63
6.6 Electronic nameplates .65
7 Type tests .65
7.1 General .65
7.101 Switchgear communication interface conformance tests .65
7.102 Time measurement of switchgear .65
8 Routine tests .75
8.1 General .75
8.101 Time measurement on switchgear .75
9 Information to be given with enquiries, tenders and orders .75
10 Rules for transport, storage, installation, operation and maintenance .77
11 Safety.77

Annex A (normative) Test overview table .79
Annex B (normative) LNs for sensors and monitoring.81
Annex C (normative) Electronic nameplates.87

62271-3  IEC:2006 – 5 –
Figure 1 – Calculation of intelligent switchgear operating times (example 1) .39
Figure 2 – Calculation of intelligent switchgear operating times (example 2) .39
Figure 3 – Opening/closing command to intelligent switchgear.41
Figure 4 – Opening/closing command to switchgear.41
Figure 5 – Opening operation of an intelligent circuit-breaker .43
Figure 6 – Closing operation of an intelligent circuit-breaker .43
Figure 7 – GIS (example 1).47
Figure 8 – AIS circuit-breaker (example 2) .49
Figure 9 – AIS circuit-breaker (example 3) .49
Figure 10 – GIS (example 1) with communication network .51
Figure 11 – GIS (variation of example 1) with serial communication network.53
Figure 12 – AIS circuit-breaker (example 2) with serial communication network .53
Figure 13 – AIS circuit-breaker (example 3) with serial communication network .55
Figure 14 – Switchgear with digital bay control function .57
Figure 15 – Performance test of an intelligent switchgear (configuration 1) .67
Figure 16 – Performance test of intelligent switchgear (configuration 2).71
Figure B.1 – Switchgear monitoring .81

Table 1 – LNs on process level .25
Table 2 – Additional LNs on process level.27
Table 3 – ACSI basic conformance statement .31
Table 4 – ACSI models conformance statement .33
Table 5 – Additional restrictions for GOOSE .35
Table 6 – ACSI service conformance statement .37
Table 7 – Recommended fibre optic transmission systems.61
Table 8 – Recommended twisted-pair transmission systems .61
Table A.1 – Test overview table .79
Table B.1 – Logical node description for circuit-breaker monitoring.83
Table B.2 – Logical node description for all kinds of switchgear except circuit-breakers.85
Table C.1 – Electronic nameplate for circuit-breakers .87
Table C.2 – Electronic nameplate for switchgear other than circuit-breakers.89
Table C.3 – Conditions for attribute inclusion.91

62271-3  IEC:2006 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 3: Digital interfaces based on IEC 61850

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardisation comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardisation in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardisation (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62271-3 has been prepared by subcommittee 17C: High-voltage
switchgear and controlgear assemblies, of IEC technical committee 17: Switchgear and
controlgear.
This standard has the status of a product family standard and may be used as a normative
reference in a dedicated product standard for highvoltage switchgear and controlgear.
This standard is to be read in conjunction with the following documents:
– IEC 61850 series "Communication networks and systems in substations"
– IEC 62271 series "High-voltage switchgear and controlgear".

62271-3  IEC:2006 – 9 –
The text of this standard is based on the following documents:
FDIS Report on voting
17C/369/FDIS 17C/376/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The following standards are also part of the IEC 62271 series under the general title High
voltage switchgear and controlgear:
Part 1: Common specifications (in preparation)
Part 2: Seismic qualification for rated voltages of 72,5 kV and above.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
62271-3  IEC:2006 – 11 –
0 Introduction
0.1 General
This standard is a product family standard for high-voltage switchgear and controlgear and
assemblies thereof. It provides an application of the horizontal standard series IEC 61850
which details a layered substation communication architecture, in the world of high-voltage
switchgear and controlgear.
By providing tutorial material such as examples and explanations, it also gives an access for
switchgear experts to concepts and methods applied in the IEC 61850 series.
Compared to switchgear equipment, digital communication technology is subject to ongoing
changes which are expected to continue in the future. Profound experience with electronics
integrated directly into switchgear has yet to be gathered on a broader basis, as this type of
equipment is not widely spread in the industry and a change of metabolism has not yet
occurred.
This situation is taken into account in this standard by setting an appropriate validity date and
by specifying several options to most of the communication-related requirements, such as
connectors or fibres.
0.2 Position of this standard in relation to the IEC 61850 series
The IEC 61850 series is a horizontal standard intended to be used for communication and
systems in the substation. The most important parts of this series define:
1. Information models for the substation automation system.
These information models include both the models of the switchgear (like circuit-breakers
and disconnectors) and other process equipment (like instrument transformers), and the
models of the substation automation system (like protection relays).
2. The communication between intelligent electronic devices (IEDs) of the substation
automation system.
3. A configuration language used to describe the configuration aspects of the substation
automation system.
4. Conformance testing of the communication interfaces of the IEDs of the substation
automation system including their data models.
Typically, IEDs like bay level controllers interface to switchgear. In that case, the data models
of the switchgear are implemented in these devices. However, this is not the only realization.
In the case where electronics are integrated direct into switchgear, the above-mentioned data
models should be implemented within the switchgear and the switchgear needs to support a
communication interface.
IEC 61850, being a horizontal standard series, leaves many options open in order to support
present and future requirements of all sizes of substations at all voltage levels.

62271-3  IEC:2006 – 13 –
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 3: Digital interfaces based on IEC 61850

1 Scope
This International Standard is applicable to high-voltage switchgear and controlgear (scope of
IEC SC 17A) and assemblies thereof (scope of IEC SC 17C) and specifies equipment for
digital communication with other parts of the substation and its impact on testing. This
equipment for digital communication, replacing metal parallel wiring, can be integrated into
the high-voltage switchgear, controlgear, and assemblies thereof, or can be an external
equipment in order to provide compliance for existing switchgear and controlgear and
assemblies thereof with the standards of the IEC 61850 series.
This International Standard is a product standard based on the IEC 61850 series. It deals with
all relevant aspects of switchgear and controlgear, and assemblies thereof with a serial
communication interface according to the IEC 61850 series. In particular it defines:
a) A selection of the information models from the IEC 61850 series that shall be supported
by such switchgear and controlgear, and assemblies thereof.
b) Conformance classes for the set of communication services that shall be supported by the
switchgear and controlgear, and assemblies thereof.
c) Modifications and extensions to type and routine tests of switchgear and controlgear, and
assemblies thereof that are required due to the serial communication interface.
d) An extension of the IEC 61850 series’ object model for switchgear monitoring.
NOTE 1 It is intended to integrate the extension of the IEC 61850 series’ object model for switchgear monitoring
into a further revision of the IEC 61850 series. Once this integration is completed, the relevant parts will be
removed from this standard.
The document is based on the IEC 61850 series, the horizontal standard series for
communication, and specifies the requirements for digital communication equipment used
within high-voltage switchgear, controlgear, and assemblies thereof, as well as the relevant
testing requirements.
The relevant switchgear standards of the IEC 62271 series are applicable in general, with the
additional specifications described in this standard.
NOTE 2 There is a limited activity today concerning switchgear with digital interface for rated voltage levels less
than, or equal to, 52 kV. Such switchgear usually does not have integrated digital communication interfaces. If
such products are to be developed, this should be done in accordance with the present standard.
NOTE 3 This standard intends to promote interoperability of communication interfaces. Interchangeability is
outside the scope of this standard, as there is no requirement for it. Interchangeability is also outside the scope of
the IEC 61850 series.
NOTE 4 For an introduction to substation communication and the related terms, definitions and models, refer to
IEC 61850-1 which provides an overview of the objectives and requirements of the IEC 61850 series in general.
IEC 61850-7-1 provides an overview of modelling techniques.

62271-3  IEC:2006 – 15 –
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60050-191:1990, International Electrotechnical Vocabulary, Chapter 191: Dependability
and quality of service
IEC 60265-2, High-voltage switches – Part 2: High-voltage switches for rated voltages of
52 kV and above
IEC 60694, Common specifications for high-voltage switchgear and controlgear standards
IEC 60794:2001, Optical fibre cables
IEC 60870-4:1990, Telecontrol equipment and systems – Part 4: Performance requirements
IEC 60874-10-3: 1998, Connectors for optical fibres and cables – Detail specification for fibre
optic adaptor type BFOC/2,5 for single and multimode fibre
IEC 61850-1:2003, Communication networks and systems in substations – Part 1: Concept
and principles
IEC 61850-2:2003, Communication networks and systems in substations – Part 2: Glossary
IEC 61850-3:2002, Communication networks and systems in substations – Part 3: General
requirements
IEC 61850-4:2002, Communication networks and systems in substations – Part 4: System and
project management
IEC 61850-5:2003, Communication networks and systems in substations – Part 5:
Communication requirements for functions and device models
IEC 61850-6:2004, Communication networks and systems in substations – Part 5:
Configuration description language for communication in electrical substations related to IEDs
IEC 61850-7-1:2003, Communication networks and systems in substations – Part 7-1: Basic
communication structure for substation and feeder equipment – Principles and models
IEC 61850-7-2:2003, Communication networks and systems in substations – Part 7-2: Basic
communication structure for substation and feeder equipment – Abstract communication
service interface (ACSI)
IEC 61850-7-3:2003, Communication networks and systems in substations – Part 7-3: Basic
communication structure for substation and feeder equipment – Common data classes and
attributes
IEC 61850-7-4:2003, Communication networks and systems in substations – Part 7-4: Basic
communication structure for substation and feeder equipment – Compatible logical node and
data object addressing
62271-3  IEC:2006 – 17 –
IEC 61850-8-1:2004, Communication networks and systems in substations – Part 8-1:
Specific communication service mapping (SCSM) – Mappings to MMS (ISO 9506-1 and ISO
9506-2) and to ISO/IEC 8802-3
IEC 61850-9-1:2003, Communication networks and systems in substations – Part 9-1:
Specific communication service mapping (SCSM) – Sampled values over serial unidirectional
multidrop point to point link 2
IEC 61850-9-2:2004, Communication networks and systems in substations – Part 9-2:
Specific communication service mapping (SCSM) – Sampled values over ISO/IEC 8802-3
IEC 61850-10:2004, Communication networks and systems in substations – Part 10:
Conformance testing
IEC 62271-103, High-voltage switchgear and controlgear – Part 103: Switches for rated
voltages above 1 kV and less than 52 kV
ISO/IEC 7498:1994, Information technology – Open Systems Interconnection – Basic
Reference Model: The Basic Model
ISO/IEC 8802-3:2001, Information technology – Telecommunications and information
exchange between systems – Local and metropolitan area networks – Specific requirements –
Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and
physical layer specifications
ITU-T V.24:2000, List of definitions for interchange circuits between data terminal equipment
(DTE) and data circuit-terminating equipment (DCE)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
time requirement
maximum acceptable time delay between source and sink
3.2
mandatory data
data where coding is specified and the information always present
NOTE Mandatory data ensures interoperability in a substation.
3.3
optional data
data where the coding is specified but the information not necessarily present
3.4
data integrity
ability of a communication system to deliver data from its originator to its destinations with an
acceptable residual error rate
NOTE In the case of switchgear with a digital interface, data integrity concerns the probability of undetected
errors resulting in wrong information about actual process states in the monitoring direction or unintended actions
in the control direction of the system.

62271-3  IEC:2006 – 19 –
3.5
interoperability
ability of two or more IEDs from the same vendor, or from different vendors, to exchange
information and use that information for correct execution of specified functions
[IEC 61850-1, definition 3.1.8]
3.6
logical node (LN)
smallest part of a function that exchanges data. A logical node is an object defined by its data
and methods
[IEC 61850-1, definition 3.1.9]
3.7
ACSI (abstract communication service interface)
virtual interface to an IED providing abstract communication services, for example,
connection, variable access, unsolicited data transfer, device control and file transfer
services, independent of the actual communication stack and profiles used
[IEC 61850-1, definition 3.1.1]
3.8
IED (intelligent electronic device)
any device incorporating one or more processors with the capability to receive or send
data/control from or to an external source (for example, electronic multifunction meters, digital
relays, controllers)
[IEC 61850-1, definition 3.1.6]
3.9
PICS (protocol implementation conformance statements
summary of the capabilities of the system to be tested
[ISO/IEC 8823-2]
NOTE PICS contain information regarding the ACSI. This information could typically be optional parts, specific
restrictions, or add-ons (see IEC 61850-7-2).
3.10
MICS (model implementation conformance statement
document which details the standard data object model elements supported by the system or
device
[IEC 61850-10]
3.11
service
functional capability of a resource which can be modelled by a sequence of service primitives
[IEC 61850-2, definition 2.121]
NOTE A resource in the context of this standard is an IED. A service primitive is an abstract, implementation
independent representation of an interaction between the service user and the service provider.

62271-3  IEC:2006 – 21 –
3.12
configuration (of a system or device)
step in system design, for example, selecting functional units, assigning their locations and
defining their interconnections
[IEC 61850-2, definition 2.14]
3.13
data security
data security of a switchgear with a digital communication interface can be defined as its
ability to avoid placing the controlled system in a potentially dangerous or unstable situation
by an undetected error
3.14
reliability
measure of a system or equipment to perform its intended function under specified conditions
for a specified period of time. It is a probability figure, based on failure data and length of
operating time
[IEC 60271, IEC 60271A, IEC 60300]
3.15
availability
ability of a device to perform its required function at any given moment
3.16
maintainability
ability of a switchgear with a digital communication interface under given conditions of use,
after detection of a fault, to be restored to full working order and to be maintained during
normal working operation
3.17
dependability
collective term used to describe the availability performance and its influencing factors:
reliability performance, maintainability performance, and maintenance support performance
[IEC 60050-191]
3.18
communication conformance test
check of data flow on communication channels in accordance with the standard conditions
concerning access organization, formats and bit sequences, time synchronization, timing,
signal form and level and reaction to errors. The conformance test can be carried out and
certified to the standard or to specifically described parts of the standard
[IEC 61850-10]
NOTE The term "communication" has been added to "conformance test" in order to state that this test refers to
communication conformance.
3.19
performance test
test on complete intelligent switchgear system to characterize it under operating conditions

62271-3  IEC:2006 – 23 –
3.20
SAS (substation automation system)
substation automation system
[IEC 61850-2]
NOTE See IEC 61850-1 for an introduction to substation automation systems.
3.21
intelligent switchgear
switchgear composed of its primary part, its mechanism, and its secondary part (for example,
auxiliary relays).
Intelligent switchgear is switchgear whose secondary part comprises a switchgear controller
3.22
switchgear controller
IED with an interface according to IEC 61850-8-1 (or proprietary). It is part of the secondary
part of switchgear. It provides for application functionality
NOTE A switchgear controller can be:
• a circuit-breaker controller (abbreviated as CBC in this standard);
• disconnector controller (abbreviated as CC in this standard);
• earthing switch controller (abbreviated as ESC in this standard);
• controller of another type of switchgear.
3.23
intelligent sensor
sensor with an interface according to IEC 61850 is an intelligent sensor (for example, used to
measure gas quality)
3.24
communication device
a communication device (such as a hub or a communication switch or a communication
gateway) is equipment used for interconnection of several IEDs. It does not provide for
application functionality
NOTE 1 The term “communication switch” is used in this standard in order to distinguish this type of equipment
from switches as defined in IEC 60265. Such a communication switch is used in local area communication
networks to combine communication network segments with different communication hardware, such as copper-
based and fibre optic serial communication networks. The defined data rate is available on every network segment
in parallel. A communication switch is a device which implements layers 1 and 2 of the ISO/OSI reference model
according to ISO/IEC 7498.
NOTE 2 A hub is used in local area communication networks to combine communication network segments based
on the same communication hardware. It is used to extend the communication network. The defined data rate is
available on all network segments in common. A hub is a device which implements layers 1 and 2 of the ISO/OSI
reference model according to ISO/IEC 7498.
NOTE 3 A communication gateway is a communication device used for interconnection of several IEDs which may
use completely different communication methods (for example, one IED with proprietary communication and
another IED with communication according to IEC 61850). A communication gateway is a device which implements
all 7 layers of the ISO/OSI communication reference model according to ISO/IEC 7498.
4 Normal and special service conditions
Clause 2 of IEC 60694, giving environmental conditions (such as climatic, mechanical,
electrical) is applicable.
62271-3  IEC:2006 – 25 –
5 Ratings and classifications
5.1 LNs on the process level of a high-voltage substation
According to the number of functions integrated in the switchgear, a choice of LNs, among
those given in IEC 61850-5, can be implemented. This standard describes a minimum
requirement if the relevant functions are present.
NOTE 1 LNs are one of the basic concepts of the IEC 61850 series. They can be seen as containers of data
within an IED. LNs are compatibly defined in IEC 61850-7-4 in order to achieve interoperability between IEDs. For
further information, IEC 61850-7-1 should be referred to.
NOTE 2 For example, a circuit-breaker controller of an intelligent circuit-breaker implements the LN XCBR.
Should that circuit-breaker controller also implement a synchrocheck function, the LN RSYN would also be
included.
The following LNs shall be used to model the communication interface of the relevant
switchgear functions; they are mandatory in the case where the function is present and it has
a serial communication interface:
NOTE 3 The following LNs are taken from IEC 61850-7-4. The column “Purpose and explanation” gives
requirements and explanations to fit into the context of this standard.
Table 1 – LNs on process level
Logical node Name Purpose and explanation
Alarm handling (creation of group alarms CALH This LN shall be used to handle alarms and events
and group events)
LN zero LLN0 This LN shall be used to address common data for
logical devices
(mandatory for every logical device)
NOTE 1 According to IEC 61850-7-2, a logical device
can be seen as a composition of LNs and
communication services.
A logical device is not a switching device.
NOTE 2 Communication services are the means to
access the data which reside in LNs.
LN physical device LPHD This LN shall be used to model common data for
physical devices
(mandatory for every physical device)
NOTE A physical device according to IEC 61850-7-2 is
an IED (such as a circuit-breaker controller), not a
switching device.
Circuit-breaker XCBR This LN shall be used for modelling circuit-breakers
NOTE If there is a single-phase circuit-breaker, this LN
has an instance per phase. These three instances may
be allocated to multiple physical devices.
All kinds of switchgear except circuit- XSWI This LN shall be used for modelling all kinds of
breakers, such as: switchgear except circuit-breakers
Switch-disconnectors
NOTE If there is a single-phase switchgear (not a
circuit-breaker), this LN has an instance per phase.
Disconnectors
These three instances may be allocated to multiple
Earthing switches
physical devices.
High-speed earthing switches
Insulation medium supervision (gas) SIMG This LN shall be used to supervise the gas volumes of
GIS (gas-insulated switchgear) regarding density,
pressure, temperature, etc.
Monitoring and diagnostics for arcs SARC This LN shall be used to supervise the gas volumes of
GIS regarding switching faults or fault arcs
Monitoring and diagnostics for partial SPDC This LN shall be used to supervise the gas volumes of
discharge GIS regarding signatures of partial discharges
Test generator GTES This LN shall be used for testing purposes by using
process signals but avoiding any impact on the process
(blocking of process outputs)
62271-3  IEC:2006 – 27 –
5.2 Additional data and LNs for switchgear monitoring
NOTE These LNs are described here until their integration into IEC 61850-7-4, edition 2 (or amendment).
As described in 5.1, the standards of the IEC 61850 series contain a number of LNs that allow
the control and monitoring of switchgear.
Where these LNs do not provide sufficient information to monitor specific switchgear, the LNs
specified in the following table, which are additional to those specified in the IEC 61850
series, shall be used.
Table 2 – Additional LNs on process
...